Year Years
1800 406
1801 406
1802 406
1803 406
1804 406
1805 406
1806 406
1807 406
1808 406
1809 406
1810 406
1811 406
1812 406
1813 406
1814 406
1815 406
1816 406
1817 406
1818 406
1819 406
1820 406
1821 406
1822 406
1823 406
1824 406
1825 406
1826 406
1827 406
1828 406
1829 406
1830 406
1831 406
1832 406
1833 406
1834 406
1835 406
1836 406
1837 406
1838 406
1839 406
1840 406
1841 406
1842 406
1843 406
1844 406
1845 406
1846 406
1847 406
1848 406
1849 406
1850 406
1851 406
1852 406
1853 406
1854 406
1855 406
1856 406
1857 406
1858 406
1859 406
1860 406
1861 406
1862 406
1863 406
1864 406
1865 406
1866 406
1867 406
1868 406
1869 406
1870 406
1871 406
1872 406
1873 406
1874 406
1875 406
1876 406
1877 406
1878 406
1879 406
1880 406
1881 406
1882 406
1883 406
1884 406
1885 406
1886 406
1887 406
1888 406
1889 406
1890 406
1891 406
1892 406
1893 406
1894 405.9
1895 405.9
1896 405.9
1897 405.8
1898 405.6
1899 405.4
1900 405.1
1901 404.7
1902 404.3
1903 403.9
1904 403.3
1905 402.7
1906 402
1907 401.3
1908 400.5
1909 399.7
1910 398.8
1911 397.9
1912 396.9
1913 396
1914 395
1915 394.1
1916 390.7
1917 387.3
1918 384
1919 380.6
1920 377.3
1921 374
1922 370.8
1923 367.5
1924 364.3
1925 361.1
1926 357.9
1927 354.8
1928 351.6
1929 348.5
1930 345.4
1931 336.8
1932 329.5
1933 321.2
1934 314.1
1935 306
1936 299.1
1937 291.3
1938 284.6
1939 277
1940 270.6
1950 120.7
1951 117.5
1952 114.5
1953 111.5
1954 108.4
1955 105.4
1956 102.7
1957 99.9
1958 97.2
1959 94.5
1960 91.8
1961 89.2
1962 86.6
1963 84.1
1964 81.7
1965 79.4
1966 77.2
1967 75
1968 72.7
1969 70.3
1970 67.5
1971 64.5
1972 61.5
1973 58.5
1974 55.7
1975 53.3
1976 51.1
1977 49.3
1978 47.6
1979 46.1
1980 44.6
1981 43
1982 41.4
1983 39.8
1984 38.3
1985 36.8
1986 35.5
1987 34.2
1988 33.1
1989 32
1990 31.1
1991 30.3
1992 29.6
1993 29.1
1994 28.6
1995 28.2
1996 27.8
1997 27.4
1998 27
1999 26.5
2000 26
2001 25.3
2002 24.7
2003 24.1
2004 23.4
2005 22.8
2006 22.2
2007 21.5
2008 20.9
2009 20.3
2010 19.7
2011 19.1
2012 18.5
2013 17.9